BSR41F Equivalent & Substitute Parts

Part Overview

The BSR41F is an NPN bipolar junction transistor manufactured by Nexperia USA Inc., designed for general-purpose switching and amplification applications. This surface mount device operates at a maximum collector current of 1 A and collector-emitter breakdown voltage of 60 V, with a transition frequency of 100 MHz and maximum power dissipation of 1.35 W. The part is currently active in production status with ROHS3 compliance and unlimited moisture sensitivity rating. Equivalent and substitute parts are identified based on matching or exceeding critical electrical parameters within the same physical package class, enabling direct or near-direct replacement in circuit designs.

Substiute Parts

BSR41F

Nexperia USA Inc.In Stock: 951BSR41F Datasheet

Current PartRFQ

BSR41,115

Nexperia USA Inc.In Stock: 97658BSR41,115 Datasheet

Parametric EquivalentRFQ

2SD1623S-TD-E

onsemiIn Stock: 21532SD1623S-TD-E Datasheet

SimilarRFQ

BCX5410TA

Diodes IncorporatedIn Stock: 145281BCX5410TA Datasheet

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BCX5416TA

Diodes IncorporatedIn Stock: 4340BCX5416TA Datasheet

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BCX54TA

Diodes IncorporatedIn Stock: 8147BCX54TA Datasheet

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BCX55TA

Diodes IncorporatedIn Stock: 189125BCX55TA Datasheet

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FCX491ATA

Diodes IncorporatedIn Stock: 19614FCX491ATA Datasheet

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FCX491TA

Diodes IncorporatedIn Stock: 43423FCX491TA Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BSR41F are classified into two categories based on electrical parameter alignment:

Parametric Equivalent: Parts that match all critical electrical specifications of the BSR41F, including collector current (1 A), collector-emitter breakdown voltage (60 V), saturation voltage, current gain, power dissipation (1.35 W), and transition frequency (100 MHz). These parts are direct replacements with identical performance characteristics.

Similar Parts: Parts that share the same NPN transistor type, surface mount package class (TO-243AA / SOT-89 variants), and core functionality but differ in one or more electrical parameters. Substitution is permissible when the application requirements allow for parameter variations. Key differentiating parameters include:

• Collector-emitter breakdown voltage (45 V, 50 V, or 60 V)
• Maximum power dissipation (500 mW or 1 W versus 1.35 W)
• Transition frequency (100 MHz or 150 MHz)
• DC current gain specifications at different test conditions
• Saturation voltage characteristics

All substitute parts maintain NPN transistor topology, surface mount configuration, TO-243AA package compatibility, ROHS3 compliance, and MSL-1 moisture sensitivity rating.

Parameter Comparison

Engineering Selection Recommendations

Parametric Equivalent Selection:

The BSR41,115 from Nexperia USA Inc. is a parametric equivalent to the BSR41F, matching all electrical specifications including 1 A collector current, 60 V breakdown voltage, 1.35 W power dissipation, and 100 MHz transition frequency. Both parts share identical saturation voltage characteristics and current gain specifications. This part is suitable for direct replacement in applications requiring identical performance. Both parts maintain ROHS3 compliance and MSL-1 moisture sensitivity rating.

Similar Part Selection:

Similar parts are suitable for substitution when application requirements permit parameter variations:

• BCX55TA matches the 60 V collector-emitter breakdown voltage of the BSR41F with identical 1 A collector current and saturation voltage. The transition frequency is increased to 150 MHz, and power dissipation is reduced to 1 W. This part is appropriate for applications where higher frequency performance is beneficial or where the reduced power rating is acceptable.

• FCX491TA also provides 60 V breakdown voltage and 1 A collector current with 150 MHz transition frequency. Saturation voltage is specified at different test conditions (100 mA, 1 A versus 50 mA, 500 mA). This part is suitable when the alternative saturation voltage specification is compatible with circuit design.

• BCX5416TA and BCX5410TA operate at 45 V breakdown voltage, which is lower than the BSR41F. These parts are suitable only for applications where the maximum operating voltage does not exceed 45 V. Both provide 1 A collector current and 150 MHz transition frequency.

• BCX54TA operates at 45 V breakdown voltage with reduced current gain (40 @ 150 mA, 2 V). Substitution is limited to applications tolerating lower voltage ratings and modified gain characteristics.

• 2SD1623S-TD-E from onsemi provides higher collector current (2 A) and transition frequency (150 MHz) but operates at 50 V breakdown voltage and 500 mW power dissipation. This part is suitable for applications requiring higher current capability where the reduced power rating and voltage specification are acceptable.

• FCX491ATA operates at 40 V breakdown voltage with significantly higher current gain (300 @ 500 mA, 5 V). Substitution is limited to low-voltage applications where the modified gain specification is compatible.

All substitute parts maintain ROHS3 compliance and MSL-1 moisture sensitivity rating, ensuring regulatory and handling compatibility with the original BSR41F.

Frequently Asked Questions (FAQ)

Q: Can BSR41,115 be used as a direct replacement for BSR41F?

A: Yes. The BSR41,115 is a parametric equivalent with identical electrical specifications across all critical parameters: 1 A collector current, 60 V breakdown voltage, 500 mV saturation voltage, 100 minimum current gain, 1.35 W power dissipation, and 100 MHz transition frequency. Both parts are manufactured by Nexperia USA Inc. and share the same SOT-89 package. Direct substitution is permissible without circuit modification.

Q: What is the primary difference between the BSR41F and BCX55TA?

A: The BCX55TA maintains the 60 V breakdown voltage and 1 A collector current of the BSR41F but differs in three parameters: transition frequency is increased to 150 MHz, maximum power dissipation is reduced to 1 W (versus 1.35 W), and DC current gain is specified at 40 @ 150 mA, 2 V (versus 100 @ 100 mA, 5 V). The BCX55TA is manufactured by Diodes Incorporated and uses the SOT-89-3 package variant. Substitution is appropriate when the application can tolerate reduced power rating and modified gain characteristics.

Q: Can I substitute a 45 V rated part for the 60 V BSR41F?

A: Substitution of 45 V rated parts (BCX5410TA, BCX5416TA, BCX54TA) is permissible only if the application circuit operates at maximum voltages not exceeding 45 V. The collector-emitter breakdown voltage specification defines the maximum safe operating voltage. Using a lower-rated part in a circuit designed for 60 V operation creates risk of device failure. Verify circuit voltage requirements before selecting a lower-rated substitute.

Q: Are all substitute parts available in the same physical package?

A: All substitute parts use the TO-243AA package class and are surface mount devices. However, specific package designations vary: the BSR41F uses SOT-89, while most substitutes use SOT-89-3. These designations refer to pin configuration and lead geometry variants within the TO-243AA family. Physical footprint compatibility must be verified against PCB design specifications. The 2SD1623S-TD-E uses a PCP package, which may not be physically compatible with SOT-89 footprints.

Q: What is the significance of the current gain (hFE) differences among substitute parts?

A: DC current gain (hFE) determines the base current required to achieve a specified collector current. The BSR41F specifies 100 minimum gain at 100 mA collector current and 5 V Vce. Substitute parts specify gain at different test conditions and with different minimum values (ranging from 40 to 300). Lower gain values require higher base drive current; higher gain values require lower base drive current. Circuit designs using fixed base resistor values may require adjustment if substituting parts with significantly different gain specifications.

Q: Can the 2SD1623S-TD-E be used as a substitute despite lower power rating?

A: The 2SD1623S-TD-E provides 2 A collector current and 150 MHz transition frequency but operates at 50 V breakdown voltage and 500 mW power dissipation (versus 1.35 W for the BSR41F). Substitution is permissible only if the application circuit dissipates less than 500 mW in the transistor. Verify power dissipation calculations before selecting this part. The higher collector current capability may be beneficial in applications requiring increased current handling.

Q: What compliance certifications apply to all substitute parts?

A: All listed substitute parts maintain ROHS3 compliance and MSL-1 (unlimited) moisture sensitivity rating, matching the regulatory and handling requirements of the BSR41F. All parts are manufactured to EAR99 export classification and are REACH unaffected. These certifications ensure compatibility with environmental and regulatory requirements across equivalent and similar parts.

Q: How do saturation voltage specifications differ among parts?

A: Saturation voltage (Vce Sat) is specified at different collector and base current conditions across parts. The BSR41F specifies 500 mV maximum at 50 mA base current and 500 mA collector current. The 2SD1623S-TD-E specifies 400 mV at 50 mA base current and 1 A collector current. The FCX491 series specifies 500 mV at 100 mA base current and 1 A collector current. These differences reflect different test conditions and may affect circuit performance in saturation-mode switching applications. Verify saturation voltage specifications against circuit design requirements.